When creating an account, you can choose whether you wish to register with your email address or Apple Login. The latter is only available through the iOS app.
- Do you have an Apple Login? You can use it to register now and log in later.
- When signing up with an email address, you need to fill in your first name, last name, email address and a password.
The downside of signing up with Apple, is that it's trickier to change your email address later on. In that case, you'll have to disconnect your Hoplr account after all. Read how.
Other than that, using this third party to register is completely safe. There is no exchange of data between the apps, apart from the bare necessity to create your account.